Answer:

damper

Answer	Crossword Clue
DAMPER	Piano part
DAMPER	Wet blanket
DAMPER	One of the piano pedals

DAMPER	Furnace control
DAMPER	Piano string vibration control
DAMPER	"Well, that certainly puts a ... on things"
DAMPER	Piano piece
DAMPER	Plate in a furnace that regulates the draft
DAMPER	Piano or furnace part.
DAMPER	Draft control.
DAMPER	Stove valve.

DAMPER	Valve in a furnace flue.
DAMPER	Furnace part
DAMPER	Mute for a horn
DAMPER	Butterfly valve, e.g.
DAMPER	Certain piano pedal
DAMPER	Piano pedal